DE86368C - - Google Patents

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Publication number
DE86368C
DE86368C DENDAT86368D DE86368DA DE86368C DE 86368 C DE86368 C DE 86368C DE NDAT86368 D DENDAT86368 D DE NDAT86368D DE 86368D A DE86368D A DE 86368DA DE 86368 C DE86368 C DE 86368C
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DE
Germany
Prior art keywords
cellulose
intermediate product
tetracetate
cellulose hydrate
acetyl chloride
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
DENDAT86368D
Other languages
German (de)
Publication of DE86368C publication Critical patent/DE86368C/de
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B3/00—Preparation of cellulose esters of organic acids
    • C08B3/06—Cellulose acetate, e.g. mono-acetate, di-acetate or tri-acetate

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

In dem Patent Nr. 85329, betreffend die Herstellung von Cellulosetetracetat, ist die' Bildung eines Zwischenproductes durch Vermischen von Cellulosehydrat mit Zinkacetat und Erhitzen der innigen Mischung beschrieben.In Patent No. 85329, relating to the manufacture of cellulose tetracetate, the 'formation is of an intermediate product by mixing cellulose hydrate with zinc acetate and heating the intimate mixture.

Gemäfs vorliegender Erfindung wird bei der Herstellung des Cellulosetetracetates das Zinkacetat durch Magnesiumacetat ersetzt, indem man 135 Theile krystallisirtes Magnesiumacetat (C4H6 OtMg, 4-i?2 O) auf 100 Theile trockenes Cellulosehydrat anwendet und das Product durch Erhitzen auf 1100C. gründlich trocknet. Dieses Zwischenproduct dient zur Herstellung von Cellulosetetracetat in der gleichen Weise wie das unter Verwendung von Zinkacetat erhaltene Zwischenproduct. Man pulvert das Zwischenproduct und mischt es allmälig mit Acetylchlorid, indem man 2 Mol. Acetylchlorid auf ι Mol. Magnesiumacetat anwendet. Die Ausführung des Verfahrens geschieht in der in dem Haupt-Patente beschriebenen Weise.According to the present invention, in the production of cellulose tetracetate, the zinc acetate is replaced by magnesium acetate by applying 135 parts of crystallized magnesium acetate (C 4 H 6 O t Mg, 4-i? 2 O) to 100 parts of dry cellulose hydrate and heating the product to 110 0 C. Dries thoroughly. This intermediate product is used to produce cellulose tetracetate in the same way as the intermediate product obtained using zinc acetate. The intermediate product is pulverized and gradually mixed with acetyl chloride by applying 2 mol of acetyl chloride to 1 mol of magnesium acetate. The method is carried out in the manner described in the main patents.

Claims (1)

Patent-Anspruch:Patent claim: Eine Abänderung des durch das Patent Nr. 85329 geschützten Verfahrens zur Herstellung von Cellulosetetracetat, dadurch gekennzeichnet, dafs man an Stelle der nach dem Haupt-Patente anzuwendenden Masse von Cellulosehydrat und Zinkacetat ein aus Cellulosehydrat und Magnesiumacetatlösung erhaltenes Zwischenproduct mit Acetylchlorid behandelt.A modification of the method of manufacture protected by patent no. 85329 of cellulose tetracetate, characterized in that instead of the mass to be used according to the main patent, from Cellulose hydrate and zinc acetate, a obtained from cellulose hydrate and magnesium acetate solution Intermediate product treated with acetyl chloride.
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Publications (1)

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Country Status (1)

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